High-Performance Catalysts for Production of Phthalic Anhydride (PA)
OxyMax™ PA Series
Edition Date :
February 06, 2026
OxyMax™ PA catalysts offer high performance in selective oxidation of o-xylene, naphthalene and mixed feedstocks to phthalic anhydride (PA). They are produced with Clariant’s proprietary fluid-bed coating process. Proprietary promotors optimize activity and selectivity in a multi-layer catalyst design. This enables catalyst solutions to be tailored to individual plant operating conditions and needs.
Product Information
Benefits
- High phthalic anhydride yields, with slow yield decline
- Excellent PA quality
- Low formation of carbon oxides (COx)
- Multi-layer design with up to five catalyst layers
- Starter layer ensures early stabilization of hotspot and long catalyst lifetime
- Tailored designs and catalyst types to suit each plant and operating condition
- Options available for all feedstocks (ortho-xylene, naphthalene, mixed feeds)
| Product composition | Promoted titaniumdioxide and vanadium-pentoxide |
| Shape | Rings |
